A psychologist, Robert Lackey, told the court that Padilla was respectful during therapy sessions but quickly got angry, WBAP reported. In 2015 and 2016, Padilla talked in therapy about wanting to burn the school and kill others and animals.

McIntosh also said Padilla had previously stabbed a dog, saying he did it "because I can't feel anything." The investigator also said the boy stabbed another student in the shoulder at a park.

Italy High student Cassie Shook has said she first went to school officials after Padilla allegedly made a "hit list" in eighth grade and her name was on it. Cassie has also said the teen got angry during a class and threw a pair of scissors at her friend and later threw a computer against a wall.

Padilla will turn 17 on Thursday. Texas automatically tries defendants as adults if they are 17. But the law is based on the suspect's age at the time of the crime, not the age at trial. Children as young as 14 can be tried as adults with a judge's approval.

If Padilla is convicted and sentenced to prison time, he would serve his sentence in an adult facility. Aggravated assault is punishable by up to 20 years in prison.

A GoFundMe page has been set up to help with Noelle's medical expenses. Her injuries "range from a bullet lodged in her neck, another removed from her abdomen to a foot of unrepairable small intestine having to be removed," according to the fundraising site.